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发明名称
Well packers
摘要
申请公布号
US3068942(A)
申请公布日期
1962.12.18
申请号
US19590857739
申请日期
1959.12.07
申请人
BROWN CICERO C
发明人
BROWN CICERO C.
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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